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But early-spring trips are often the most mechanically demanding period of the year, exposing system weaknesses – especially when cold mornings, muddy trails and unpredictable temperature swings test your comfort systems.
If you're preparing your rig for the first adventures of the year, upgrading your water heater may be one of the most noticeable improvements you can make. The FOGATTI 10L RV Tankless Water Heater (InstaShower Ultra) is designed with those shoulder-season variables in mind, and built to deliver instant, stable hot water on demand – transforming early-season camping from bracing to comfortable.
With up to 66,000 BTU of heating power and a flow rate of up to 3.9 gallons per minute, it delivers consistent performance across multiple outlets. That output places it toward the upper end of the current RV tankless market, where many systems typically operate in the 40,000–55,000 BTU range, helping your RV feel less like a compromise and more like a true mobile home.
Built for Real-World Spring Conditions
Spring camping is dynamic. Warm afternoons can quickly give way to chilly evenings, and mountain mornings rarely match the forecast. The InstaShower Ultra is engineered to handle that variability.
Dual-Stage Combustion for Temperature Swings
Early-season camping often means inlet water temperatures near freezing. Under those conditions, tank heaters deplete quickly and tankless units must ramp output aggressively to maintain comfort.
InstaShower Ultra's wide 8,500–66,000 BTU range works alongside a smart dual-stage combustion system:
Two-segment mode helps prevent overheating on unseasonably warm days
Five-segment mode delivers strong heating output during cool nights
You're not wasting energy when it's mild, but you're fully covered when temperatures dip.
±1°F Temperature Precision
With ±1°F precision control, the system maintains steady water temperature even if someone turns on the kitchen tap mid-shower. No sudden spikes, no uncomfortable drops – just consistent comfort.
No More Cold Starts
A built-in 13.05 oz pre-mix tank prevents cold-water surges. Turn the tap and warm water arrives immediately, instead of cycling from icy to hot.
After a muddy spring hike or a long ride through damp forest trails, that immediate warmth feels restorative rather than indulgent.